The demo has gone live for those that pre-ordered the game. I am... almost never one to pre-order games, but when it comes to Valve I just have to slap the money down.
a) The melee weapons are both hilarious and awesome. There is a guitar, a machete and a frying pan in the demo. The machete is close enough to being a katana if you squint a little.
b) I was worried that I would miss the old characters, but the new ones seem just as endearing. I like running around with a southern USA accent.
c) The new special infected are cool. There's a 'jockey' that jumps on your back, a 'charger' who is like a mini tank, and a 'spitter' who coats the ground in acid (this last will be especially appreciated against teams that camp a corner in versus matches).
a) Day time is not as scary as night time
b) Some graphics-related performance issues. The game regularly freezes up for 5-10 seconds using the same settings I play Left 4 Dead 1 with. I'm sure these will be patched.
c) The censored Australian version is laughably light on the gore. When the corpses hit the floor they just fade from sight. This makes me a sad panda.
So overall I am pleased, but I hope there are more dark areas in the full version and I hope there is some dodgy way to obtain un-neutered carnage (anybody heard of one?).